Fracture healing in estrogen-treated and castrated rats

The healing of a midfibular fracture was studied in mature rats. The strength of the healing fracture was determined by a constant speed-driven tensiometer which measured the force required to separate the healing callus. The breaking strength of the healing experimental fracture was ascertained in control, estrogen-treated, and oophorectomized animals. The fracture strength was not significantly different in any of these groups.